NJ7P SQL Tube Database Query

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26
Medium-Mu Triode

EIA Base & Outline

EIA Base: 4DEIA Bulb: 14-01
Source ........................................ RCA R-10 - 1932

26
Medium-Mu Triode

EIA Base: 4DEIA Bulb: 14-1
Source ........................................ RCA RC-11 - 1933

Application

Source ........................................ RCA R-10 - 1932
The '26 is an amplifier tube containing a filament designed for operation on alternating current. It is useful as a radio-frequency amplifier and transformer-coupled audio-frequency amplifier. The '26 is not ordinarily suitable for use as a detector or power output tube.

Mechanical Data

Source ........................................ RCA R-10 - 1932
Bulb .......................................... S-14
Base Type ..................................... Medium 4-Pin
EIA Outline ................................... 14-0
Maximum Overall Height ........................ 4-11/16 In.
Maximum Diameter .............................. 1-13/16 In.
EIA Base ...................................... 4D
Mounting Position ............................. Vertical

Source ........................................ RCA RC-11 - 1933
Bulb .......................................... ST-14
Base Type ..................................... Medium 4-Pin
EIA Outline ................................... 14-1
Maximum Overall Height ........................ 4-11/16 In.
Maximum Diameter .............................. 1-13/16 In.
EIA Base ...................................... 4D

Electrical Data

Source ........................................ RCA R-10 - 1932
Filament Voltage .............................. 1.5 V
Filament Current .............................. 1.05 A

Direct Interelectrode Capacitances (approx)

Triode
Source ........................................ RCA R-10 - 1932
Input ......................................... 3.5 pf
Output ........................................ 2.2 pf
Grid to Plate ................................. 8.1 pf

Maximum Ratings (Design Center Values)

Triode
Source ........................................ RCA R-10 - 1932
Plate Voltage ................................. 180 V

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA R-10 - 1932
Plate Voltage ................................. 90 V
Grid No. 1 Voltage ............................ -7 V
Amplification Factor .......................... 8.3
Plate Resistance (approx) ..................... 8900 Ω
Transconductance .............................. 935 µMho
Plate Current ................................. 2.9 mA

Class A Amplifier
Source ........................................ RCA R-10 - 1932
Plate Voltage ................................. 135 V
Grid No. 1 Voltage ............................ -10 V
Amplification Factor .......................... 8.3
Plate Resistance (approx) ..................... 7600 Ω
Transconductance .............................. 1100 µMho
Plate Current ................................. 5.5 mA

Class A Amplifier
Source ........................................ RCA R-10 - 1932
Plate Voltage ................................. 180 V
Grid No. 1 Voltage ............................ -14.5 V
Amplification Factor .......................... 8.3
Plate Resistance (approx) ..................... 7300 Ω
Transconductance .............................. 1150 µMho
Plate Current ................................. 6.2 mA

Notes

Source ........................................ RCA RC-17 - 1954
1. Discontinued type.

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Sat, 04 Dec 2021 20:25:02 -0700